Results 31 to 40 of about 2,845,050 (305)

A study of the nerve root damage in whiplash injury occurrence mechanisms using human head-neck finite element model

open access: yesNihon Kikai Gakkai ronbunshu, 2021
The number of whiplash injuries in rear-end collisions is still high worldwide. Since the 1990s, many researchers have studied the mechanisms of injury occurrence in which were focused in the early stage of the rear impact. However, the current situation
Junji HASEGAWA   +2 more
doaj   +1 more source

GJ 900: A new hierarchical system with low-mass components [PDF]

open access: yes, 2007
Speckle interferometric observations made with the 6 m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences in 2000 revealed the triple nature of the nearby ($\pi_{Hip}=51.80\pm1.74$ mas) low-mass young ($\approx200$ Myr)
A. Alonso   +38 more
core   +1 more source

Research on UMTS 900 MHz Implementation and Planning

open access: yesDianxin kexue, 2013
A UMTS 900 MHz planning resolution based on the feasibility analysis of UMTS 900 MHz implementation was proposed. The deployment of UMTS 900 MHz in Shekou area in Shenzhen,taking the advantage of 1ow-frequency signa1 diffraction capability,expand the ...
Weijia Li   +3 more
doaj   +2 more sources

Enzyme-ultracytochemical study of adenylate and guanylate cyclases in normal and pathologic human nasal mucosa

open access: yesEuropean Journal of Histochemistry, 2009
The ultracytochemical localization of adenylate cyclase (AC) and guanylate cyclase B (GC-B) and C (GC-C) activity was studied after stimulation with pituitary adenylate cyclase activating peptide, C-type natriuretic peptide and guanylin, respectively, in
MG Rambotti, G Altissimi, A Spreca
doaj   +1 more source

Diseases Causing Visual Field Defects at Shimla Hills

open access: yesDelhi Journal of Ophthalmology, 2014
Introduction: Visual field (VF) measurement is the critical component for elucidating pathological conditions affecting not only ophthalmological but also neurological system.
Kalpana Sharma   +3 more
doaj   +1 more source

On the classical r-matrix structure of the rational BCn Ruijsenaars–Schneider–van Diejen system

open access: yesNuclear Physics B, 2015
In this paper, we construct a quadratic r-matrix structure for the classical rational BCn Ruijsenaars–Schneider–van Diejen system with the maximal number of three independent coupling parameters.
B.G. Pusztai
doaj   +1 more source

Movin' On Up: Reforming America's Social Contract to Provide a Bridge to the Middle Class [PDF]

open access: yes, 2008
This research brief summarizes recent findings by the Center for Economic and Policy Research on job quality and workers' economic security. Using a rigorous methodology that improves on other more standard measures of economic security, we find that one
John Schmitt   +3 more
core  

Quasimodularity and large genus limits of Siegel-Veech constants

open access: yes, 2018
Quasimodular forms were first studied in the context of counting torus coverings. Here we show that a weighted version of these coverings with Siegel-Veech weights also provides quasimodular forms.
Chen, D., Möller, M., Zagier, D.
core   +2 more sources

Factors affecting sperm recovery rates and survival after centrifugation of equine semen [PDF]

open access: yes, 2012
Conventional centrifugation protocols result in important sperm losses during removal of the supernatant. In this study, the effect of centrifugation force (400 or 900 × g), duration (5 or 10 min), and column height (20 or 40 mL; Experiment 1); sperm ...
Eilts, B. E.   +4 more
core   +2 more sources

Structural biology of ferritin nanocages

open access: yesFEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

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